How to Use MT6701 magnetic encoder: Examples, Pinouts, and Specs

The MT6701 magnetic encoder from MagnTek is a high-precision sensor designed to detect the angular position or rotation of a magnetic field. This component is commonly used in applications requiring accurate position sensing, such as robotics, motor control, and industrial automation.

• Rotary position sensing
• Brushless DC motor commutation
• Robotics and automation
• Encoder for industrial control

• Supply Voltage (Vcc): 3.3V to 5V
• Output Voltage (Vo): 0.4V to 2.4V (proportional to magnetic field angle)
• Operating Temperature Range: -40°C to +125°C
• Resolution: 12-bit (4096 positions per revolution)
• Interface: Analog output

1. Power Supply: Connect the Vcc pin to a 3.3V or 5V power supply and the GND pin to the ground.
2. Output Connection: Connect the Vo pin to an analog input on your microcontroller, such as an Arduino UNO, to read the angular position.
3. Magnet Placement: Ensure that the magnet is correctly positioned relative to the sensor for accurate readings.

• Magnetic Field: Use a diametrically magnetized magnet and align it properly with the sensor.
• Power Supply: Ensure a stable power supply to avoid fluctuations in readings.
• Noise Filtering: Implement filtering techniques to minimize electrical noise that can affect the output signal.

// MT6701 Magnetic Encoder Example Code for Arduino UNO
const int analogPin = A0; // Connect Vo to A0 on Arduino UNO

void setup() {
  Serial.begin(9600); // Start serial communication at 9600 baud rate
}

void loop() {
  int sensorValue = analogRead(analogPin); // Read the analog value from encoder
  float angle = map(sensorValue, 0, 1023, 0, 360); // Map the value to 0-360 degrees
  Serial.print("Angle: ");
  Serial.println(angle); // Print the angle to the Serial Monitor
  delay(100); // Delay for readability
}

• Inaccurate Readings: Ensure the magnet is correctly positioned and the power supply is stable.
• No Output Signal: Check connections to the Vcc and GND pins, and ensure the magnet is present.

• Magnet Position: Adjust the position of the magnet if the readings are inconsistent.
• Power Supply: Verify that the power supply is within the specified voltage range and is stable.
• Signal Filtering: Implement low-pass filters to reduce noise in the output signal.

Q: Can the MT6701 be used with a 5V system? A: Yes, the MT6701 can operate with a supply voltage between 3.3V and 5V.

Q: What is the resolution of the MT6701? A: The MT6701 has a 12-bit resolution, providing 4096 positions per revolution.

Q: How do I calibrate the MT6701? A: Calibration involves ensuring the magnet is properly aligned and the output voltage is within the expected range for the given angular position.

Q: Is the MT6701 affected by external magnetic fields? A: External magnetic fields can affect the readings. It is recommended to use the MT6701 in an environment with minimal magnetic interference.

For further assistance, please contact MagnTek support or refer to the MT6701 datasheet for more detailed information.